中铝山西分公司二期扩建工程是在一期烧结法基础上增加了拜耳法部分,二期一步于1992年12月投产,主要增加的大型设备有一组高压溶出、一组种分槽和一台焙烧炉,形成了年产70万吨氧化铝的生产规模;二期二步在一步的基础上又进一步扩建,新增相同类型的一组高压溶出器、种分槽和一台 The expansion project of Phase II of Chinalco Shanxi Branch added Bayer method on the basis of the first sintering method. The second phase was put into operation in December 1992. The major increase of large-scale equipment includes a group of high-pressure dissolution, Taiwan baking furnace, forming an annual output of 700,000 tons of alumina production scale; two two-step further expansion on the basis of one step, the addition of a group of the same type of high-pressure dissolvers, seed tank and a